851380 Volvo.Penta Clamp

Illustration 1 g00275086
Contactor and transducer panel.Setpoint - A setpoint is a critical limit of an operating parameter. A setpoint can be a temperature, a pressure, a level, a speed, etc. An alarm or a shutdown is activated if an operating parameter reaches a setpoint.Contactor - A contactor is a switch that is controlled by temperature or pressure. The temperature or pressure that triggers the switch is set to a critical setpoint. If the setpoint is reached, an alarm or a shutdown will be activated.Transducer - A transducer converts a mechanical stimulus into an electrical signal. An external power source is required.Protective systems are mandatory on Caterpillar 3600 Series Fast Vessel Engines. Two types of protective systems are available. The Marine Monitoring System is controlled by a programmable logic control. The Electrical Engine Protective System is controlled through relay logic. Both systems are briefly described in this section.Marine Monitoring System
The Marine Monitoring System uses a microprocessor to provide engine control and engine monitoring. The Marine Monitoring System enables an operator to use a display screen for controlling and monitoring engine operation.When the package for annunciation is included, the operator is alerted to conditions that can cause alarms and shutdowns. The Marine Monitoring System can stop the engine if the engine operation reaches a setpoint that is programmed for shutdown.Marine Engine Control Panel
Illustration 2 g00270098
(1) Screen. (2) Switch.Engine operation is monitored and controlled through the Marine Engine Control Panel. The Marine Engine Control Panel screen (1) is a touchscreen. The screen is used to configure the Marine Monitoring System for the particular engine. The configuration includes the following features:
The optional gauges can be customized, enabled, or disabled.
Metric units or English units can be selected for the display.
The language that will be displayed can be selected. A keypad is required for this feature.
The communication ports for external addresses can be selected and configured.
The auxiliary gauges can be configured.
Any auxiliary alarms can be configured.An operator can choose from the following menu of monitoring features by using screen (1) :Engine Overview - This window provides a general summary of the engine operation. This window graphically displays a top view of the engine. This window also displays operating parameters, including rpm, engine hours, operating temperatures and operating pressures.Auxiliary Gauges and Status Outputs - This window displays the information that is provided by the auxiliary gauges. This window is also used to monitor the status of the communication of auxiliary parameters.Alarm Annunciator - This window is used to display the precise cause of alarms that are active. This window can also display a history of all the alarms that have occurred. The operator can download the history to a floppy disk.Air and Fuel - This window displays a set of gauges that show the air system and fuel system parameters.Cooling System - This window graphically displays a diagram of the cooling circuit. The temperatures and pressures for the cooling system are also displayed. A window of the gauges and a trend chart for the cooling system can be accessed through this window.Exhaust - This window displays a summary of the exhaust port temperatures. The exhaust port temperature deviation, the exhaust manifold temperature, and the exhaust stack temperatures can also be accessed through this window.Lube Oil System - This window graphically displays a diagram of the lube oil system. The temperatures and pressures of the lube oil system are also displayed. A window of the gauges and a trend chart for the lube oil system can be accessed through this window.Alarms
An optional beacon and a horn are required for annunciation of alarms. To test the annunciation, the operator can turn switch (2) to the "TEST" position. If an alarm is activated, the "Alarms" icon at the top of the screen illuminates. An "Alarm Annunciator" window appears on screen (1). To acknowledge the alarm, turn switch (2) to the "ACKNowledge" position. To view a graphic display of the particular alarm, touch the "SUMMARY ALARM" button that is illuminated in the "Alarm Annunciator" window.In addition to annunciation for undesirable engine operating conditions, an alarm will be displayed for the following conditions:
A sensor output is out of specification.
A wire from a contactor has failed.
A wire from a contactor has been removed.For example, the pressure sensor for lube oil is a 4 to 20 mA output. If the output from the pressure sensor is 22 mA, an alarm for the sensor will be displayed.If a wire for a contactor is normally open, the closed side of the contactor is used in order to determine the continuity of the circuit. If the wire has failed or if the wire has been removed, an alarm for the sensor will be displayed.A log of the events is recorded by the Marine Monitoring System. The log can be saved to a floppy disk. A report can be made from the record of the events.Electrical Engine Protective System
Relay - A relay is an electromechanical device which uses a relatively small current to control an electromagnet. The electromagnet activates electrical contacts. The contacts open and the contacts close in order to switch larger electrical currents.The electrical engine protective system provides contactors that have Marine Society approval. The control system consists of relays, contactors, timers, and other components.The relay based system consists of the following main components:
A control panel
A contactor and transducer panel
A mechanical gauge panel
An optional annunciator panelThe components are installed at the shipyard.The wiring for the engine can be installed at the factory in order to meet the Marine Society requirements. The wiring for the engine is attached to a junction box that is mounted on the engine. The mechanical sensors are routed to an interface bracket on the front of the engine.The electrical connections between the junction box and the start/stop panel are made at the shipyard. The connections from the interface bracket to the contactor and transducer panel and the gauge panel are also made at the shipyard.The contactors are configured as alarms and shutdowns in order to meet the requirements of the